Matter: Grade Recovery

What is a pure substance?

• composed of a single kind of atom.

• has a definite and constant composition

• composed of two or more elements in a specific ratio

• physical combinations of pure substances that have no definite or constant composition

What is a compound?

• composed of a single kind of atom.

• has a definite and constant composition

• composed of two or more elements in a specific ratio

• physical combinations of pure substances that have no definite or constant composition

What is a mixture

• composed of a single kind of atom.

• has a definite and constant composition

• composed of two or more elements in a specific ratio

• physical combinations of pure substances that have no definite or constant composition

What is a Element

• composed of a single kind of atom.

• has a definite and constant composition

• composed of two or more elements in a specific ratio

• physical combinations of pure substances that have no definite or constant composition

True/false mixtures can be homogenous or heterogeneous

• True

• False

what is an example of pure substance

• mixture

• element

what is a example of compound

• water

• metal

an example of mixture

• salt and sand

• hydrogen and oxygen

an example of element

• gold

• salt water